Channeling-machine.



H. H. MERCER. HANNELING MACHINE.

' APPLICATION FILED JAILIG, 1909.

Patented Nov. 25, 1913.

2 SHEETS-SHEET 2,

101121?,assur@ Inventor E111-9110er.

Henry UNITED sTATEs PATENT OFFICE.V

HENRY I-I. MERCER, OF CLAREMON'I, NEW HAMPSHIRE, ASSIGNR TO lSULLIVAN MACHINERY COMPANY, OF CLAREMONT, NEW HAMPSHIRE, A CORPORATION OF MAINE.

CHANNELINGr-MACHIN-E.

Specification of Letters Patent.

'Patented Nov. 25, 1913.

To all whom t may concern Be it known that I, HENRY H. MERCER, a citizen of the United States, residing at Claremont, in the county of Sullivan, State of New Hampshire, have invented an Improvement in Channeling-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to devices for lubricating parts subjected to high temperatures and pertains more particularly to lubricating means for the feed screws of stone working or quarrying machines, as, for example, channeling machines or the like.

The invention consists in various features of construction and arrangement which will appear in the course of the succeeding description and will be defined in the appended claims.

The character of the inventionnmay best be understood by reference to a specific embodiment shown by way of illustration in the accompanying drawings, in which:

Figure 1 is a front elevation o-f a channeling machine and embodying the invention; Fig. 2 is a vertical longitudinal section in a plane parallel to that of Fig. 1, through the axis of the feed screw shown in Fig. 1; Fig. 3 is a plan view in section on the line 3 3 in Fig. 2; and, Fig. 4 is asection on the line 4v-4 of Fig. 2.

The illustrative embodiment of the invention shown in the drawings comprises a track channeling machine having two channeling units 7 and 8 arranged side by side at the edge of the truck 9. The latter has wheels 10-10 to run on the usual tracks 11 on the bottom of the quarry. The channeling tools as herein sho-wn are preferably driven respectively by pressure fluid engines of any practicable character, having their cylinders 14, 15, together with the crosshead guides 16, 16 17, 17 mounted upon and carried by a vertically adjustable frame 20. Said frame 20 is gibbed to slide vertically upon longitudinal ways supplied on a standard 22, supported in any suitable manner upon the truck 9. The cross-head guides 16-16 and 17-17 (mounted as described on the vertically adjustable carriage 20) guide the wo-rking movement of the channeling tools 7 and 8, driven respectively by the cylinders 14 and 15.

The vertical movement of the tool and cylinder carriage .20 on the standard 22 is employed for adjusting the tools 7 and 8 toward and from the channel and accommodating the too-ls to different depths of cut; and for this purpose an adjusting screw 25 is employed..

Referring now to Fig. 2 the illustrative screw 25 is suspended from the yoke 26 by a split threaded collar 27, clamped upon the upper extremity of the screw shank and bearing upon the crown of the yoke 26. Bearing upc-n the under side of the yoke 26 and pinned or otherwise fixed upon the screw 25 is a pinion 28 which, in any practicable manner, may be connected to power for turning the screw and vertically adjusting the carriage 20. The cylinders 14 and 15 may be integrally cast, as illustrated; and they are in any case preferably supported close together. In the specific illustration the cylinders 14 and 15 are formed in the same integral casting; and the feed screw 25 extends through a part of said casting and is appropriately connected thereto by threads. The cylinder casting 30 has a cylindrical aperture 32 in which is seated an internally threaded sleeve 33. The latter has a shoulder 34 at its lower end to engage the under face of the casting 30. The upper extremity of the sleeve 33, projecting beyond the casting 30, is split at 35 and eX- ternally threaded to engage a split collar 36 which, when screwed down, bears against the topmost facey of the cast-ing 30. Thus the sleeve 33 is firmly held upon thecasting 30, engaging the latter between the shoulder 34 and the collar 36. The upper portion of the sleeve 33 ispreferably enlarged to receive a nut 3S, provided at its upper end with seats for a Spanner wrench or the like. N Vhen the threaded engagement between the feed screw 25 and sleeve 33 wears, so as to permit back-lash, the nut 38 may be screwed down to compensate for wear'and maintain a snug engagement between itself and the screw, and the sleeve 33 and screw. When the split collar 36 is tightened it contracts the split end 35 of the sleeve 33 and thereby firmly grips the nut 38 to hold it in adjusted position.

With such an arrangement as has been described, the feed screw 25 threads into a nut member which is likely to become heated l to a high temperature by reason of its contiguity to the tool actuating cylinders. In such case if the threaded engaging parts of the screw and nut member be lubricated in the usual manner, by introducing oil at their uppermost points of. engagement, said oil will vbe quickly dried without effectively lubricating the parts throughout their working contact. To provide for the lubrication of parts likely to be subjected to high temperatures, as exemplified in the present disclosure, this invention contemplates some such arrangement as is illustrated in the drawings and hereinafter described.

Tok provide lubricant for the threaded engaging surfaces. of the sleeve 33 and screw 25, the latter has extending throughout its length a conduit 40, with a mouth 41 at its upper extremity and an outlet 42 at its lower extremity. The latter opens into a cylindrical lubricant-receiving chamber 43 appro- 2' priately secured to the lower end of sleeve 33 or otherwise supported, preferably from the casting 30. When the conduit 40 in the feed screw 25 is more or less filled with lubricant the latter tends to fill the chamber 43 and to rise therein, seeking the level of that in the conduit 40, and lubricate the screw and sleeve 33. Preferably the sleeve 33 and aperture 82 in the casting 30 are so related (as by having the sleeve reduced in diameter along part of its length) that an annular air chamber 44 surrounds the sleeve and at least partially intervenes between the latter and the body of the casting 30. Air ducts 45, 45 admit air to the chamber 44 and permit a constant current to flow therethrough when the casting is heated.

Asv described above, provision may be made for lubricating the engaging surfaces of the feed screw and the nut member, from beneath. -If desired this manner of lubrication may be supplemented by applying lubricant to an upper portion of the screw 25, as for example at the top of the adjusting nut 38. Preferably, in addition to the lubricant' conduit 41, the screw 25 has one or more transverse conduits communicating with the conduit 40 and extending to the exterior of the screw to facilitate delivery of lubricant from the interior of the screw, as in case the lower part of the con- Y duit 4() should beco-me clogged or `otherwise obstructed.

. During theruse of the machine, as the screw is turned, it is caused to'advance or retract relatively to the chamber 43, and lubricant is thereby expelled from the chamber or caused to enter the same through the lubricant supply lpassages in the screw. Such passages, in permitting the expulsion of the lubricant from the chamber as the screw is advanced, act as a vent for the lubricant chamber and this action causes a continual surging of the lubricant into and out of the chamber and about the threads of ftruck beneath overhanging rock and the like; and, at the same time, permits the entire tool supporting carrlage to be suspended from the screw by convenient attachment between the latter and the cylinder casting.

Even though the latter be at times heated to high temperature, the construction is nevertheless practicable, because of the cooling and lubricating provisions contemplated by this invention.

It is to be understood, of course, that the specilic embodiment hereinbefore described has been shown merely for purposes of illustration; and the invention is by no means essentially limited thereto. Also, the described application of the invention to a duplex track channeling machine, having two channeling units, driven respectively by pressure fluid engines, is merely illustrative, and is not to be construed as in any way indispensable to the invention. It is true,

moreover, that the features of the invention are not essentially interdependent, since they may be employed separately to advantage. No attempt has been made hereinbefore to deline the scope of the invention, this oiice being delegated exclusively to the subjoined claims.

Claims.

l. In a channeling machine, the combination of an adjustably supported toolactuating device; a vertically disposed feed screw for adjusting the same having a part located in proximity to a heated wall of said device; and means connected to said device to engage said screw; said machine being provided with one or more passages disposed about said screw but separated therefrom by a wall and having one or more inlets open to the air adjacent thebottom and one or more outlets open to the air adjacent the top providing for the cooling of said screw by convection currents of air for preventing substantial conduction of heat from said device to said screw and the engaging part.

2. In a channeling machine, the combination of an adjustably supported tool-actuating device; a frame to sustain the same, a feed screw intermediate the frame and said device and having threaded engagement with part of the latter, said feed screw having also a lubricant conduit extending axially through the screw; said screw having a passage for distributing lubricant from the said conduit to the screw thread.

maaar@ 3. In a channeling machine, the combination of an adjustably supported tool-actuating device; a feed screw for adjusting the same having a part proximate a heated wall of said device; said machine having a lubricant chamber in which the lower end of the screw may be immersed; and having also a lubricant conducting conduit for the lubricant immersing said lower screw end.

4. In a machine of the character described, the combination of a tool and cylinder supporting carriage; a depending tool and superposed cylinder thereon; a frame to support the carriage; a feed screw connect-ing thel frame with the carriage and having screw threaded engagement with the cylinder casting; and lubricating means, said machine being provided with air cooling means for preventing conduction of heat` from the cylinder to the threads of thel and an interior lubricant passage leading to I said chamber whereby the advancementof 5. In a machine of thecharacter described, the combinatie-n of a cylinder and tool supporting carriage; a frame to sustain the same; a feed adjusting device intermediate l the frame and said carriage and having engagement with the latter proximate avcylin.- f der; said adjusting device having an interj nal lubricator conduit spaced from the immediate heat of the cylinder and having a passage for distributing lubricant from said conduit to the engaged surfaces of the adjusting device and said carriage; said machine having an air passage interposed between the lubricant distributing `means and the heated parts of the carriage.

6. In a machine of the character described,

the combination of a supporting wheeled truck; a downwardly acting'tool; a superposed cylinder; a carriage to support the.

tool and cylinder; a frame to sustain the carriage; a feed screw held against axial movement by said frame and prevented from projecting beyond the frame and having threaded engagement with a part of the carriage proximate a cylinder; and lubricating means to lubricate the screw, said machine being pro-vided with means for opposing conduction of heat to the screw to permit the latter to be conveniently connected to the carriage at its upper end near the superposed cylinder.

7 A stone working machine comprising, in combination, an adjustably supported tool-actuating unit; an adjusting device therefor having engagement therewith proxmate a heated part thereof; and means for conducting lubricant to the engaged surfaces of said unit and adjusting device while keeping it separated from said heated part of the unit; said machine having means for opposing conduction of heat to the lubricant.

8. In a stone working machine, the combination with an adjustably supported, toolactuating,devicehaving heatedwalls, of afeed screw for adjusting the same having a part proximate the heated walls of said device, said machine having all-.ibricantcham ber surrounding said screw, andsaidiscrew having a lubricant supply conduit passing through its interior.

9. A stone work-ing machine. having a toolactuating device, a feed screw` for adjusting the same, said machine having a lubricant chamber surrounding the threads of said feed screw, and said screw having avlubricant supply Apassage communicating with said chamber and passing through the interior of the screw. y

l0. A stone workingmachine having a tool-actuating device, a Vfeed screw, said ma? chine having also a lubricant chamber in which one end Aof the feed screw is immersed,

Vsc

lation of lubricantthrough said passage and chamber.

11.' In a stone working machine the combination with an adjustably supportedtoolactuating device, of a feed screw therefor, said Imachine havinga lubricant conduit extending through the interior of the feed screw, and one or more lateral lubricant passages connecting said conduit with the threads of the' screw.

12. In a channeling machine the combination with an adjustably supported tool-actu ating device, of a feed screw, a member providing a lubricant chamber adapted to receive Athe end of said screw, said screw havinga lubricant conduit passing throughits ibody, and having also one or more lateral `open-ings in the conduit leading to the threads of the said screw.

13. A stone working machine having a plurality of tool-actuating devices, movable supporting means on which the same are mounted, a frame, and a feed screw abutting against the frame, but having threaded engagement with the movable supporting means, said machine having a lubricant chamber located between the tool-actuat-ing devices and below the threaded portion of the supporting means, said chamber being adapted to receive the end of said screw, and said machine having means to permit the passage of lubricant to and from the chamber through the movement of the screw.

14. A stone working machine having a plurality of toolactuating devices, movable supporting means on which the same are mounted, a frame, a feed screw attached to the frame and having threaded engagement with the movable supporting means, said machine having a lubricant chamber located between the tool-actuating devices and below the threaded portion of the supporting mounted, a frame, and a feed screw abutting against the frame, but having threaded engagement with the movable supporting means, said machine having a lubricant chamber located between the tool-actuating devices and below the threaded portion of the supporting means, said chamber being adapted to receivey the end of said screw,

' said machine having means for providing a circulation of air adjacent the threaded portion of said supporting means, and having also meansto permit the passage of the lubricant to and from the lubricant chamber through the movement of the screw.

16. A stone working machine having a cylinder provided with its piston and a co` operating tool or tools, supporting means for the cylinder, said means being mounted for sliding movement toward or from the work, a feed screw having threaded engagement with the supporting means, a frame, a stationary part of which abuts against the feed screw, said machine having a lubricant chamber carried by and movable with the supporting means and adapted to receive the end ofthe screw, and having also a lulbricant conduit leading to said chamber.

17. A channeling machine having a cylinder with its piston and coperating tool or tools, supporting means for the cylin der, said means having sliding movement toward or from the work, a feed screw having threaded engagement with the supporting means, a frame, against a stationary part of which said feed screw abuts, said machine having a lubricant chamber carried by said supporting means and adapted to receive the end of said screw, and means for introducing lubricant to the chamber without Contact with the threaded screw-engaging portion of the supporting means. V

18. A channeling machine having a toolactuating cylinder, a standard upon which said cylinder is slidably mounted, a feed screw abutting against a part on said standard, but having threaded engagement with a part attached to said cylinder, said ma` chine having a lubricant chamber carried by said cylinder and adapted to receive the end of said screw, and having also a lubricant passage leading to said chamber.

19. A stone working machine having, in combination, the standard 22, feed screw 25, the latter provided with the interior conduit 40, a tool cylinder and tool adjustable on the standard by the feed screw, and the chamber-containing portion 43 surrounding the lower end of the feed screw.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

HENRY H. MERCER.

Witnesses:

E. J. BOUDRARD, S. T. CHANDLER.

Washington, D. C.

T46 y Copies of this patent may be obtained for ve cents` each, by addressing the Commissioner of Patents, 

